Used With Routines: AXIS, BAR, BAR3D, BOXPLOT, CONTOUR, CONTOURFS, CONTOUR2, OPLOT, PIE, PLOT, SHADE_SURF, SHADE_SURF_IRR, SURFACE

Corresponding System Variable: None.

Specifies that the screen or page is not to be erased. By default the screen is erased, or a new page is begun, before a plot is produced.